-54.89% is the change from 931 to 420
Calculation steps:
[( 420 - 931 ) ÷ 931] x 100 = -54.89%
Formula
Percentage change = [(420 - 931) / 931] x 100
Subtract the new number by the original number
420 - 931 = -511
-511 ÷ 931 = -0.5488721804511278
-0.5488721804511278 x 100 = -54.89%